[Telemetry] Move from telemetry WaitFor to py_utils WaitFor

telemetry/telemetry/internal/platform/profiler/sample_profiler.py

Index: telemetry/telemetry/internal/platform/profiler/sample_profiler.py
diff --git a/telemetry/telemetry/internal/platform/profiler/sample_profiler.py b/telemetry/telemetry/internal/platform/profiler/sample_profiler.py
index 63001b53b4ffd34367311f07c296c95920fdf8af..19559014888f7b2803d58f1d90fdafe89a7a4577 100644
--- a/telemetry/telemetry/internal/platform/profiler/sample_profiler.py
+++ b/telemetry/telemetry/internal/platform/profiler/sample_profiler.py
@@ -8,9 +8,10 @@ import sys
 import tempfile
 
 from telemetry.core import exceptions
-from telemetry.core import util
 from telemetry.internal.platform import profiler
 
+import py_utils
+
 
 class _SingleProcessSampleProfiler(object):
   """An internal class for using iprofiler for a given process."""
@@ -27,7 +28,7 @@ class _SingleProcessSampleProfiler(object):
             'Failed to start sample for process %s\n' %
             self._output_path.split('.')[1])
       return 'Sampling process' in stdout
-    util.WaitFor(IsStarted, 120)
+    py_utils.WaitFor(IsStarted, 120)
 
   def CollectProfile(self):
     self._proc.send_signal(signal.SIGINT)